- Why did you pick Death Knight for the new class?
They have a connection to Arthas and Northrend, and we needed more tanks. The playable DKs will be allied with the Horde or Alliance, fighting against Arthas.
- What will adding another tanking class do to the group/raid game?
We want all tank classes to be equally good in general, so you can use any of them for a 5-man, but we want them to have distinct raiding roles. (They also took this opportunity to reiterate for the nth time that "hero class" doesn't mean it's more powerful than other classes, just more different.)
- How is the DK different from other tanks?
No shield, powerful melee abilities, magic attacks. The devs are making sure they have the core tanking abilities of keeping aggro and mitigating damage, while still making the DK feel like its own thing.
- Will we see some classic DK spells and abilities?
Yes, we're taking a lot from previous Warcraft material. One thing that will set them apart as a new class, but still tie them into WC3 DKs, is the rune system.